U-601410, Forwards Rept on Operational Data Gathering & Evaluation Program & Proposed Containment Purge Criteria,Per Sser 5 (NUREG-0853).Supporting Data for Purging Operations Listed

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Forwards Rept on Operational Data Gathering & Evaluation Program & Proposed Containment Purge Criteria,Per Sser 5 (NUREG-0853).Supporting Data for Purging Operations Listed
ML20244A820
Person / Time
Site: Clinton Constellation icon.png
Issue date: 04/04/1989
From: Holtzscher D
ILLINOIS POWER CO.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20244A825 List:
References
RTR-NUREG-0853, RTR-NUREG-853 U-601410, NUDOCS 8904180209
Download: ML20244A820 (2)


Text

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U-601410-L30-8?(04-04)-LP p 1A.120 ILLINDIS POWER COMPANY CLINTON POWER STATION. P.O. box 678. CLINTON. ILLINOIS 61727 1

L .L April 4, 1989.

10CFR50.36 Docket No. 50-461 Document Control Desk Nuclear Regulatory Commission Washington, D.C. 20555

Subject:

Clinton Power Station Report on Containment Purge Operational Data Gathering and Evaluation Program-and Proposed Containment Purge Criteria i

Dear Sir:

1 Attached is Illinois Power Company's (IP) report which presents the results of the Containment Purge Operational Data Gathering and Evaluation Program and the proposed containment purge criteria for the Clinton Power Station'(CPS). This report satisfies the requirement in Section 6.2.4.1 of Supplement 5 to the Clinton Safety Evaluation Report (NUREG-0853) (SSER 5). Section 6.2.4.1 requires IP to' provide the NRC staff, before startup

after the first refueling outage, with a reevaluation'of.the need to use the containment purge systems during plant operational modes 1, 2, and 3 and with criteria for purge. operation which will be used for the remainder of the plant life.

Data on plant operation'related to containment purging were gathered-through the first fuel cycle. IP believes that.the data collected support

. purging operation as follows:

No containment ventilation or purge isolation valves shall be open while purging the drywell. g The large (36-inch) containment building ventilation system and the small (12-inch) continuous containment purge system shell not be opera;ca simultaneously.

The large (36-inch) containment building ventilation system shall not be operated over 250 hours0.00289 days <br />0.0694 hours <br />4.133598e-4 weeks <br />9.5125e-5 months <br /> per year in modes 1, 2, or 3.

There are no other restrictions on operation of the small (12-inch) continuous containment purge system.

(tY O

8904180209 390404 g i DR ADOCK 0 % 461

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1 e l U-601410 L30-89 ( 04- 04)-LP 1A.120

.These proposed containment purge criteria are based on ALARA savings q of 160 man-REM over the life of the plant with minimal risk to the health and safety of the public. These proposed criteria also result in optimum reliability of the purge valves because of reduced cycling for containment pressure control. A more detailed justification is* attached.

CPS will begin to implement the new criteria at the start of the second fuel cycle. Please contact me if there are any questions or comments regarding this information.

Sincerely yours,

%.w. /

D. L. Holtzscher Acting Manager -

Licensing and Safety PEW /pge Attachments cc: NRC Resident Office NRC Region III, Regional Administrator NRC Clinton Licensing Project Manager Illinois Department of Nuclear Safety

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